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I have a site that has different features but I do not want a feature to show if it does not have a variable assigned to it.

For example, my product has a featured list like this:

<h3>Specifications</h3>
<ul>
    <li class="element element-text first">
        <strong>Manufacturer: </strong><?php echo $manufactuer;?>
    </li>
    <li class="element element-text">
        <strong>Model #: </strong><?php echo $model;?>
    </li>
    <li class="element element-text">
        <strong>Previously Ran: </strong><?php echo $ran;?>
    </li>
    <li class="element element-text last">
</ul>

On the front end, I don't want the Model line displayed if that doesn't have a variable assigned to it.

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  • 1
    Please google for isset() and empty(). Commented Jan 28, 2015 at 16:56
  • Please do not post answer inside the question body. Also please make sure to be concise when wording your question. Commented Jan 28, 2015 at 17:42

5 Answers 5

Reset to default
1 
<?php if (isset($model) && !empty($model)) : ?>
<li class="element element-text">
  <strong>Model #: </strong>
  <?php echo $model;?>
</li>
<?php endif; ?>
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7 Comments

It is still showing "Previously Ran:" when there is no variable.
Yes, this example is only for the Model item, you should do the same for each variable. Each <li>.....</li> segment should be inside a php block like the one i put there.
Ok that means the variable exists but it's empty, You can modify each if like this <?php if (isset($model) AND !empty($model)) : ?> I updated the code above.
Worked like a charm. I didnt know you could use both isset and empty. I was trying it with one or the other. I sure appreciate your time and knowledge.
Thanks. You can use only empty(), but sometimes it throws warnings if the variable isn't set, so using both this way is error free ;)
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You need to use JavaScript to write the HTML when you start the page. You probably want something like this (make sure you have a script called JQuery, you can find it online):

$.ajax({ url: '/my/site.php',
    datatype: "JSON", /* Personal preference */
    type: 'get',
    cache: false,
    success: function(data) {
        alert(output);
        if(data[1] != null){
            document.getElementById('ID').innerHTML = "<li>" + data[1] + "</li>";
        } else {
            console.log("nothing found");
        }
    }
});

You may need to adjust things a bit for your particular code writing, but this would be the approach I think you need. In general, dynamic elements (ones that are not static i.e. ones that respond to stuff outside the HTML) need to dealt with in JavaScript.

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you can do this 

  <?php if(isset($model)): ?>
          <li class="element element-text">
          <strong>Model #: </strong><?php echo $model;?>
        </li>
  <?php  endif; ?>
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0

You can do,

<?php echo (!empty($model))?$model:'';?>

Read up on: empty, and ternary operator

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0

Full code like this:

<h3>Specifications</h3>
        <ul>
            <?php if(isset($manufacturer) && !empty($manufacturer)): ?>
                <li class="element element-text first">
                    <strong>Manufacturer: </strong><?php echo $manufactuer;?>
                </li>
            <?php endif; ?>
            <?php if(isset($model) && !empty($model)): ?>
                <li class="element element-text">
                    <strong>Model #: </strong><?php echo $model;?>
                </li>
            <?php endif; ?>
            <?php if(isset($ran) && !empty($ran)): ?>
                <li class="element element-text">
                    <strong>Previously Ran: </strong><?php echo $ran;?>
                </li>
            <?php endif; ?>
            <li class="element element-text last"></li>
       </ul>
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1 Comment

PS You also forgot to close last <li> tag on your code

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